(English Medium) ICSE Class 9 - CISCE Question Bank Solutions for Chemistry

Explain the following:

Mass of an atom is concentrated inside the nucleus of the atom.

What is the main characteristic of the last elements in the periods of a periodic table? What is the general name of such elements?

Match column A with column B.

Under what conditions iron reacts with water.

Hydrogen can be prepared with the metal zinc by using: water

Hydrogen is manufactured by the 'Bosch Process'.

Give the equation with conditions.

Hydrogen is manufactured by the 'Bosch Process'.

How can you obtain hydrogen from a mixture of hydrogen and carbon monoxide? 

Define absolute zero and absolute scale of temperature. Write about the relationship between °C and K.

What is the need for the Kelvin scale of temperature?

What is the boiling point of water on the Kelvin scale? Convert it into a centigrade scale. 

What is the relationship between the Celsius and Kelvin scales of temperature?

Convert (i) 273°C to Kelvin and (ii) 293 K to °C. 

Give reason for the following:

All temperatures in the absolute (Kelvin) scale is in positive figures.

State the following:

The volume of a gas at 0 Kelvin

Fill in the blanks:

The temperature on the Kelvin scale at which molecular motion completely ceases is called……………

Fill in the blanks:

The melting point of ice is …………. Kelvin. 

State what are ‘greenhouse gases’ and name the major greenhouse gases.

State the consequence of the greenhouse effect.

Give balanced equations for the formation of carbon dioxide – a major greenhouse gas, during combustion of fossil fuels.

State the impact of greenhouse gases on geographic, climatic and agricultural conditions.